FZUS53 KLOT 142036
NSHLOT

Nearshore Marine Forecast
National Weather Service Chicago/Romeoville IL
336 PM CDT Tue Apr 14 2026

For waters within five nautical miles of shore on Lake Michigan

Waves are provided as a range of significant wave heights, which
is the average of the highest 1/3 of the waves, along with the
average height of the highest 10 percent of the waves which will
occasionally be encountered.

LMZ741-742-150315-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
336 PM CDT Tue Apr 14 2026

.LATE THIS AFTERNOON...South winds 15 to 25 kt. Chance of showers
and thunderstorms. Waves 1 to 2 ft.
.TONIGHT...South winds 15 to 20 kt becoming southwest. Showers
with thunderstorms likely. Some thunderstorms may produce heavy
rainfall. Waves 1 to 2 ft.
.WEDNESDAY...South winds 15 to 20 kt becoming southwest. Showers
and a chance of thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Showers and a chance of thunderstorms. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming west in the
afternoon. Chance of showers and slight chance of thunderstorms
in the morning, then showers likely and a chance of thunderstorms
in the afternoon. Waves 1 to 2 ft.

$$

LMZ740-150315-
Winthrop Harbor to Wilmette Harbor IL-
336 PM CDT Tue Apr 14 2026

...TORNADO WATCH 109 IN EFFECT UNTIL 10 PM CDT THIS EVENING...

.LATE THIS AFTERNOON...South winds 15 to 25 kt. Chance of showers
and thunderstorms. Some thunderstorms may be severe with damaging
winds, large hail, and tornadoes. Waves 1 to 2 ft.
.TONIGHT...South winds 15 to 20 kt becoming southwest. Showers
with thunderstorms likely in the evening, then showers and
thunderstorms likely after midnight. Some thunderstorms may be
severe with damaging winds, large hail, tornadoes, and heavy
rainfall. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds around 15 kt becoming south. Showers
and a chance of thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Showers and a chance of thunderstorms in the evening, then chance
of showers and slight chance of thunderstorms overnight. Waves
1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming west in the
afternoon. Chance of showers and slight chance of thunderstorms
in the morning, then chance of showers and thunderstorms in the
afternoon. Waves 1 to 2 ft.

$$

LMZ743>745-150315-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
336 PM CDT Tue Apr 14 2026

.LATE THIS AFTERNOON...Southwest winds 15 to 25 kt. Chance of
showers and thunderstorms. Waves 1 to 2 ft.
.TONIGHT...South winds 15 to 20 kt becoming southwest. Showers
with thunderstorms likely. Some thunderstorms may produce heavy
rainfall. Waves 1 to 3 ft.
.WEDNESDAY...South winds 15 to 20 kt becoming southwest. Showers
and a chance of thunderstorms. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...South winds 10 to 15 kt becoming southwest.
Showers and a chance of thunderstorms. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming west in the
afternoon. Showers likely and slight chance of thunderstorms in
the morning, then showers likely and a chance of thunderstorms in
the afternoon. Waves 1 to 2 ft.

$$

KJB